Refrigerant Identification - Bosch ACS 753 Repair Instructions

Plumbing and Mechanical
ACS 753, ACS 763, ACS 863 Service Manual
REFRIGERANT IDENTIFICATION PROCESS (ACS 863 only)
When the recover or tank fill function is selected, the machine will check pressures on the service hoses. Once
pressure is verified the machine will initiate identification of the refrigerant. The low side identifier solenoid (S17) will
open intermittently, allowing refrigerant to flow to the refrigerant identifier, through the 0.028-inch internal diameter
orifice. After analyzing the refrigerant, the identifier will either send a "PASS" message to the control board to begin
the recovery process, or a "FAIL" message will display. If the refrigerant fails to pass the ID test, the machine will
print the results, and ask if you want to repeat the ID test. If the refrigerant ID test, fails, the test will automatically
repeat at least two more times.
Figure 4-9. Refrigerant Identification
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Robert Bosch GmbH SP00D00609 2018-03-26